Subtract 72/42 from 25/30
1st number: 25/30, 2nd number: 1 30/42
25/30 - 72/42 is -37/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
25/30 = 25 × 7/30 × 7 = 175/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210 - Subtract the two like fractions:
175/210 - 360/210 = 175 - 360/210 = -185/210 - After reducing the fraction, the answer is -37/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/30-72/42 25/60-72/42 25/30-72/84 75/30-72/42 25/90-72/42